Automatic control switch



May 15, 1928. T. J. SCOFIELD v AUTOMATIC CONTROL SWITCH Filed Dec. 10, 1926 2 Sheets-Sheet 1 May 15, 1928.

1,669,784 "r. J. SCOFIELD AUTOMATIC CONTROL SWITCH Filed Dec 10. 1926 2 Sheets-Sheet 2 s production of an i so so arate contacts.

Patented Mails, 192s.

umrab STATES rnnonoan aonuson scormnn, or JACKSON, MICHIGAN.

AUTOMATIC CONTROL SWITCH.

Application and December 10, me.- Serial No. 15a,aea.

This invention relates to certain new and useful improvementsfin automatic control switches. The main object of the invention is the particularly for use .in connection with radio-receiving apparatus which W111 automa'tically connect the circuits of said apparatus with a B-batter elim nator upon turning on'oi the regular swltch usually positioned on the front panel of suchapparatus, and when the said switch is turned ofi will automatically break the circuit leading to the B-battery eliminator and connect the A-battery of the receiving set-with a source of charging current.

1 A further object resides in the fact that the entire apparatus is simple'and comparatively permanent construction, and. m

eludes a casing by which all the other portions of the apparatus are supported through the-medium of a single. attaching means. A' further feature'resides in the fact that '25. the two-plug receiving portions of the doublg outlet. project through similarly shaped openings'inthe casing and the body ofthe outlet acts to insulate the relay portion of the a paratus from the casing. v

er advantage resides in the structural feature that the double outlet has three contact members, oneof which contact members is common tothe two circuits controlled respectively by the outlets. as A further advantage resides'in the arrangement of and'means for supporting the relay in connection with the double outlet. Other objects and advantages "relate to details of the structure and the parts thereof, all as will more fully appear from the following description, taken in connection with the accompanying drawings in which:

Figur'e l is a to plan view of an automatic control switc of this invention. 1

as Figurefl is asection on'line 2+2, Fig

ure'l. v g, 4 Figure 3 is a bottom plan view of the body of the double outlet with the insulating cover removed and showing three i2gure 4 is'a section on line 4-4, Fig Figure'5 is a, diagrammatic illustration of appropriate circuits. I

automatic control switch wardly from the body -5 of the ouble the body ,-5 and covered by an insulating The apparatus as herein 'illustrated' compr ise'sa cup-shape casing -1-=-, in this in- 'stanc e of somewhat rectangular form, and

provided in its upper side with a pair of spaced openings separated by an integral cross-bar 2--. These openings are adapted to and do receive two socket. members -3 and -4- res ectively spaced apart a distance substantia ly equal to the width of the cross-bar -2-, and extendin up- 65 outlet 6 a distance suflicient so that when the socket members and 4-'- are projected throu h the openi they will be positioned a s ort distance ave the upper s1de of the casing --1-.

'lhe double outlet member --6-- is preferably, as shown molded from insulatin material and is secured in sition wit the socket members projected ihrough the openings in the casing b means of a single screw --fZ'- which exten s through an open- -mg in the cross-bar into a bushing -8- molded into the body 2- and is threaded A label member 9 as shown, may rest upon the upper surface of the cross-bar -2-- and extend partially around the socket members -3 and 4--, and is secured in place by means of screw -7--. Thls label member is adapted to receive suitable trade-mark and otherinformative in- The double outlet member 6-, is in .general of ordinary construction, and as usual includes a contact -l0- which is com mon to both sockets -3 and -4-, but in lace of a second contact -10- common to 0th sockets, there is providedtwo contact members 11 and 12-- spaced apart and insulated from each other, one o whieh,-as l1, provides a contact for the socket -3-, while the other, as -12-, provides a second contact for the socket -4;--. These contacts may be recessed into plate 13 secured to the body -5 m any suitable manner, as by riyets -14-- molded into the body -5.

These rivets --14- also constitute the means for supporting a relay mechanism -15-,of any usual and ordinary construc tion. This relay mechanism is perhaps best illustrated in F1gure4, but may be of varithreaded bolt -18', but is insulate is. secured 'to the dou le outlet -6fby means of rivets -4 and the threaded bolt ,18 extends through an opening in the downwardly projecting arm 23 of the angle bar -22, and is secured in position by means of nut -24 terminal member -25 being interposed between the arm -23- and nut 24.' Thus, vthe double outlet constitutes the sole means for supporting the relay 15 and the screw 7-' constitutes the sole means for connecting the entireapparatus to the" casing '1-, whereby easy removal for repair, change or in-' spection is'-permitted. v v v The-relay, as stated, may be of the usual form, but includes the movable bar -30- carrying contacts 3l-'' and -32- adapted to contact respectively with the contacts upon the arms 19 and"-'.20 Spring 34 normally, maintains the contact 31 in electrical connection with the contact on arm -20, but electro-magnet 17- when energized, will: draw the bar -30 toward the 'core 36 to bring contact 1-32- into electrical connection with the contact on the bar19.

The mechanical construction and arrangement of the apparatus constitutes the invention here ela1med,"and for that reason no special descri tion of the electric circuits is necessarut it will be apparent from Figure 2 t at when switch -40-,' usually positioned on the front panel of the radio-', receiving apparatus is closed, the relay' 15- will be operated, and through ener- 'zing of ma et'--17-, contact will e brought into electrical connection with the contact on arm l9-- to close the circuit through the. B-eliminator indicated at -3l if plug -e2 is engaged with its socket t When switch 40 ,is opened, plug -43-'-being properly engaged with socket 3, the battery -45- will' be brou ht into communication with a source of c arging f current 46,

lhe advantages and features-of this invention reside in the a mechanical structure of the device, and altho I have. shown and "described a specific form and construction of device, together with the particular relation and association of the parts, ll do not 1. An automatic control switch comprising a casing having a pair of spaced openings in oneside thereof, a unitary double outlet structure having a pair of spaced socket portions positioned in res ective openings in the casing, said outlet tructure having a contact common to both socket portions and two additional separate contacts, one for each socket portion and means within the casing for automatically closing either one of two circuits, one of said circuits including the common contact member and one of the separate contacts andthe other circuit including the common ,contact member and the other of said separate contacts.

2. An automatic control switch comprising a casing having a pair of spaced openings in one side thereof, a unitary double outlet structure having a pair of spaced socket portions positioned in respective openings in the vcasing, said outlet structure having a contact common to both socket portions and two additional separate contacts, one -for each socket portion and a relay structure within the casing for automatically closing either one of two circuits, one of said circuits including the common'contact member and one of the separate contacts and the other circuit including the coon contactmember and the other of said separate contacts. I

3. An automatic control switch comprising a casing having a pair of spaced openings in one side thereof, a unitary double outlet structure having a pair of spaced socket portions positioned in respective openings in the casing, said outlet structure having a contact-common to both socket portions and two additional separate contacts, one for each socket portion and a rela structure within the casing for automatica ly closing either one of two circuits, one of said circuits includin the common contact member and one oft e separate contacts and the other circuit including the common contact memher and the other of said separate contacts,

and means for securing therelay structure to the outlet structure whereby the former is supported to thereby permit unitary removal of the outlet structureand relay structure from the casing.

4. An automatic control switch comprising a casing having a pair of spaced openin in one'side thereof, a unitary double outlet structure having a pair of spaced socket portions positioned in respective openings 1n the casing, a single screw constituting the sole means forsecuring the outlet structure to the casing, said outletstructure havclosin .Isa1d circuits includmg the common contact ing a contact common to both socket portions and two additional separate contacts, one for each socket portion and a 'relay structure within the casing for automatically either one of two circuits, one of member and one of the separate contacts and the other circuit including the common contact member and the other of said so arate contacts, and means for securing t e rela structure to the outlet structure whereby t e former is su ported to thereby permit unitary removal the outlet structure and relay structure from thec-asing. I c

5; An automatic control switch comprising a casing having a pair of spaced openings in oneside thereof, a unitary double outlet structure having a pair of spaced socket per-- tionsiavailable through respective openings for operative engagement, said outlet structure having a contact common. to both socket portions and two additional separate contacts, one forleach socket portion, and a relay structure within the casing for auto matically closing either one of two circuits, one of said circuits including the common contact member and one of the se arate contacts, and the other circuit inc uding the common contact member and the other of said separate contacts.

6. An automatic control switch comprising a casing having a pair of spaced openings in one side thereof, a unitary double outlet structure having a pair of spaced socket portions available through'respective openngs for operative engagement, said outlet 1 structure having a contact common to both socket portions and two additional separate contacts, one for each socket portion, a relay structure within the casing for automatically closin either one of two circuits, one of said 01 cuits including the common contact member and one of the se arate contacts, and the other circuit including thecommon contact member and the other of said separate contacts, and means forsupporting the 

